Removal of metal ions from aqueous solutions by extraction with ionic liquids
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Pérez de los Ríos, Antonia; Hernández Fernández, Francisco José; Lozano Blanco, Luis Javier; Sánchez Segado, Sergio; Moreno Sánchez, Juan Ignacio; [et al.]Área de conocimiento
Ingeniería QuímicaPatrocinadores
This work was partially supported by the SENECA Foundation-Agency of Science and Technology of Murcia Region 11086/AC/09 and 11086/AC/09 grants in the framework of the II PCTRM 2007-2010 and by the CICYT ENE2006-09395 and SENECA Foundation 05649/PI/07grants.Fecha de publicación
2010-02Editorial
American Chemical SocietyCita bibliográfica
A. P. de los Ríos, F. J. Hernández-Fernández, L. J. Lozano, S. Sánchez, J. I. Moreno, and C. Godínez Journal of Chemical & Engineering Data 2010 55 (2), 605-608. DOI: 10.1021/je9005008Revisión por pares
siPalabras clave
SolventsExtraction
Ions
Metals
Salts
Resumen
This work analyzed the extraction of Zn2+, Cd2+, and Fe3+ from aqueous hydrochloride solutions using ionic liquids in the absence of chelating agents. For this purpose, ionic liquids based on 1-(n-alkyl)-3-methylimidazolium and tetraalkylammonium cations and several anions (hexafluorophosphate, bis[(trifluoromethyl)sulfonyl]imide, tetrafluoroborate, and chloride) were tested. It was found that the ionic liquid methyltrioctylammonium chloride, [MTOA+][Cl−], allowed almost complete removal (extraction percentage > 94) of Zn2+, Cd2+, and Fe3+ from the aqueous solutions. Furthermore, efficient selective separation of Zn2+/Fe3+and Cd2+/Fe3+ was achieved using 1-methyl-3-octylimidazolium tetrafluoroborate, [omim+][BF4−], since high extraction percentages were reached for Zn2+ and Cd2+ (extraction percentage > 90) while this parameter was very low for Fe3+. These results indicate that the use of ionic liquids as an alternative to traditional extraction agents in liquid/liquid extraction of heavy ...
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